CN207074167U - Organic matter detecting system in a kind of air - Google Patents
Organic matter detecting system in a kind of air Download PDFInfo
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- CN207074167U CN207074167U CN201720315404.9U CN201720315404U CN207074167U CN 207074167 U CN207074167 U CN 207074167U CN 201720315404 U CN201720315404 U CN 201720315404U CN 207074167 U CN207074167 U CN 207074167U
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Abstract
It the utility model is related to organic matter detecting system in a kind of air, it is characterised in that：Including the air pump for extracting air, the organic matter detection sensor being connected with air pump output end, and the display screen being connected with organic matter detection sensor, wherein described organic matter detection sensor includes the detection components that can detect content of organics in air that can be sent the light source of ultraviolet and coordinate with the light source, the light source is detection group LED uviol lamps, and detection group LED uviol lamps are connected the size of current that detection group LED uviol lamps are flowed through by current control circuit control with current control circuit；Detection components include detection pipe, the ultraviolet line receiver of detection group, detection group signal amplification circuit, signal processing circuit, and display screen is connected with signal processing circuit.Compared with prior art, the utility model extracts air into organic matter detection sensor by aspiration pump, content of organics in organic matter detection sensor energy effective detection air, and the content of organics in air is shown by display screen.
Description
Technical field
Organic matter detecting system in a kind of air is the utility model is related to, for detecting total organic content in air.
Background technology
Escaping gas in organic matter in air, especially some finishing materials, such as formaldehyde, organic benzene, organic class (benzene, first
Benzene), organic Ammonia, chloroform class etc., there is significant damage to body.In addition, bacterium, mould, virus in air etc., to human body
Also there is significant damage.Existing product, technology on the market, it is impossible to the content of organics in effective detection air, so, exploitation
A kind of effective air content of organics detection device, is significant.
Utility model content
Technical problem to be solved in the utility model is to provide organic quality testing in a kind of air for above-mentioned prior art
Examining system.
Technical scheme is used by the utility model solves above-mentioned technical problem：Organic analyte detection system in a kind of air
System, it is characterised in that：Including the air pump for extracting air, the organic matter detection sensor being connected with air pump output end, and with
Organic matter detection sensor connection display screen, wherein the organic matter detection sensor include can send ultraviolet light source and
The detection components that can detect content of organics in air coordinated with the light source, wherein the light source is that detection group LED is ultraviolet
Lamp, detection group LED uviol lamps are connected with current control circuit flows through detection group LED uviol lamps by current control circuit control
Size of current；The detection components include
The detection pipe that can be penetrated by the ultraviolet that the detection group LED uviol lamps are sent, water can pass through the detection pipe；
The ultraviolet line receiver of detection group, sent for detection from the detection group LED uviol lamps and penetrate the detection pipe
The intensity of ultraviolet afterwards；
Detection group signal amplification circuit, the output end of the ultraviolet line receiver of detection group are defeated with detection group signal amplification circuit
Enter end connection, the uitraviolet intensity signal for the ultraviolet line receiver of detection group to be detected is amplified；
Signal processing circuit, the output end of detection group signal amplification circuit are connected with signal processing circuit, signal transacting electricity
Road is also connected with current control circuit, and the uitraviolet intensity after signal processing circuit is amplified according to detection group signal amplification circuit is believed
Number calculate by detecting content of organics in inner air tube；
Display screen is connected with signal processing circuit, for showing the content of organics in air.
As an improvement, the organic matter detection sensor also includes housing, detection pipe accommodating cavity is provided with the housing, is examined
Test tube is arranged in detection pipe accommodating cavity；The current control circuit and detection group LED uviol lamps are arranged at housing side, inspection
The ultraviolet line receiver of survey group, detection group signal amplification circuit and signal processing circuit are arranged on another opposite side of housing；In housing
Provided with it is being connected with detection pipe accommodating cavity, positioned at the first light transmission passage of detection pipe accommodating cavity two opposite sides and the second light transmission passage,
The ultraviolet light that detection group LED uviol lamps are sent is by reaching detection group after the first light transmission passage, detection pipe and the second light transmission passage
Ultraviolet line receiver.
Improve again, the organic matter detection sensor also includes control component, and the control component includes：
The control component includes：
Control group LED uviol lamps, control group LED uviol lamps connected with the detection group LED uviol lamps after with current control
Circuit connects and the size of current of detection group LED uviol lamps and control group LED uviol lamps is flowed through by current control circuit control；
The control tube that can be penetrated by the ultraviolet that the control group LED uviol lamps are sent, control tube inner vacuum or sets sky
Gas sets pure water；
The ultraviolet line receiver of control group, sent for detection from the control group LED uviol lamps and penetrate the control tube
The intensity of ultraviolet afterwards；
Control group signal amplification circuit, the output end of the ultraviolet line receiver of control group are defeated with control group signal amplification circuit
Enter end connection, the uitraviolet intensity signal for the ultraviolet line receiver of control group to be detected is amplified；
The output end of control group signal amplification circuit is also connected with signal processing circuit, and signal processing circuit is according to detection group
Uitraviolet intensity signal after signal amplification circuit amplification and the uitraviolet intensity signal after the amplification of control group signal amplification circuit
Calculate by detecting content of organics in inner air tube.
Improve again, the organic matter detection sensor also includes housing, and the housing is interior provided with detection pipe accommodating cavity and right
Accommodating cavity is looked after, detection pipe is arranged in detection pipe accommodating cavity；Control tube is arranged in control tube accommodating cavity；The current control
Circuit, detection group LED uviol lamps and control group LED uviol lamps are arranged at housing side, the ultraviolet line receiver of detection group, detection
Group signal amplification circuit, the ultraviolet line receiver of control group, control group signal amplification circuit and signal processing circuit are arranged on housing
Another opposite side；It is provided with that being connected with detection pipe accommodating cavity, the first printing opacity leads to positioned at detection pipe accommodating cavity two opposite sides in housing
Road and the second light transmission passage, the ultraviolet light that detection group LED uviol lamps are sent pass through the first light transmission passage, detection pipe and the second printing opacity
The ultraviolet line receiver of detection group is reached after passage；Be provided with housing it is being connected with control tube accommodating cavity, positioned at control tube accommodating cavity
The light transmission passage of two opposite sides the 3rd and the 4th light transmission passage, the ultraviolet light that control group LED uviol lamps are sent are led to by the 3rd printing opacity
The ultraviolet line receiver of control group is reached after road, control tube and the 4th light transmission passage.
Improve again, the air filter for the solid particle being used in air filtering is provided with front of the aspiration pump.
Compared with prior art, the utility model has the advantage of：Taken out by aspiration pump into organic matter detection sensor
Take air, content of organics in organic matter detection sensor energy effective detection air, and the content of organics in air is passed through
Display screen is shown.
Brief description of the drawings
Fig. 1 is the schematic diagram of organic matter detecting system in air in the utility model embodiment one；
Fig. 2 is the schematic diagram of organic matter detection sensor in the utility model embodiment one；
Fig. 3 is the dimensional structure diagram of organic matter detection sensor in the utility model embodiment one；
Fig. 4 is the three-dimensional cutaway view of organic matter detection sensor in the utility model embodiment one；
Fig. 5 is the schematic diagram of organic matter detection sensor in the utility model embodiment two；
Fig. 6 is the dimensional structure diagram of organic matter detection sensor in the utility model embodiment two；
Fig. 7 is the three-dimensional cutaway view of organic matter detection sensor in the utility model embodiment two；
Fig. 8 is the three-dimensional cutaway view at another visual angle of organic matter detection sensor in the utility model embodiment two；
Fig. 9 is the three-dimensional cutaway view at another visual angle of organic matter detection sensor in the utility model embodiment two；
Figure 10 is the schematic diagram of organic matter detecting system in air in the utility model embodiment three.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment one
Organic matter detecting system in air as shown in Figure 1, including for extracting the air pump 101 of air, exported with air pump
End connection is used to detect the organic matter detection sensor 102 of content of organics in air, and with organic matter detection sensor
The display screen 103 for being used to show content of organics in air of 102 connections.
In the present embodiment, organic matter detection sensor 102, referring to shown in Fig. 2~4, including the light source of ultraviolet can be sent
And the detection components that can detect content of organics in air coordinated with the light source；Wherein light source is detection group LED uviol lamps
1, detection group LED uviol lamp 1 is connected with current control circuit 5 flows through detection group LED uviol lamps by the control of current control circuit 5
Size of current；The detection components include
The detection pipe 2 that can be penetrated by the ultraviolet that the detection group LED uviol lamps 1 are sent, water can pass through the detection pipe 2；
The ultraviolet line receiver 3 of detection group, sent for detection from the detection group LED uviol lamps 1 and penetrate the detection
The intensity of ultraviolet after pipe 2；
Detection group signal amplification circuit 4, output end and the detection group signal amplification circuit 4 of the ultraviolet line receiver 3 of detection group
Input connection, the uitraviolet intensity signal for the ultraviolet line receiver 3 of detection group to be detected is amplified；
Signal processing circuit 6, the output end of detection group signal amplification circuit 4 are connected with signal processing circuit 6, signal transacting
Circuit 6 is also connected with current control circuit 5, and signal processing circuit 6 is according to the ultraviolet after the amplification of detection group signal amplification circuit 4
Strength signal is calculated by content of organics in air in detection pipe 2.
In the present embodiment, organic matter detection sensor also includes housing 11, and detection pipe accommodating cavity is provided with housing 11, detects
Pipe 2 is arranged in detection pipe accommodating cavity；Current control circuit 5 and detection group LED uviol lamps 1 are arranged on same circuit board A,
And it is located at the side of housing 11, the ultraviolet line receiver 3 of detection group, detection group signal amplification circuit 4 and signal processing circuit 6 are arranged on
On another piece of circuit board B, and it is located at 11 another opposite side of housing；Be provided with housing 11 it is being connected with detection pipe accommodating cavity, be located at
What detection pipe accommodating cavity two opposite sides the first light transmission passage 11a and the second light transmission passage 11b, detection group LED uviol lamp 1 was sent
Ultraviolet light is by reaching the ultraviolet line receiver 3 of detection group after the first light transmission passage, the light transmission passage of detection pipe 2 and second.
The inlet suction port 12 and air outlet adapter 13 connected respectively with detection pipe both ends are connected with housing, inlet suction port and is gone out
The position that gas joint is connected with detection pipe both ends is provided with sealing ring 14.
The detection method of above-mentioned organic matter detection sensor comprises the following steps：
Step (1), detection pipe 2 vacuumized, or pure water is poured in detection pipe 2, be then turned on the detection group
LED uviol lamps 1, by the output control signal of signal processing circuit 6 to current control circuit 5, make to flow through detection group LED ultraviolet
Linear change is presented in the electric current of lamp 1；Then signal processing circuit 6 is separately recorded under different current conditions organizes signal and puts after testing
Uitraviolet intensity signal after the big amplification of circuit 4, and these uitraviolet intensity values are averaged, then it is designated as the first ultraviolet
Intensity reference point；
Step (2), prepare the control air sample that known to N parts content of organics and content differs, keep the inspection
Survey group LED uviol lamps 1 are opened, and this N part control air sample then are passed sequentially through into the detection pipe 2 respectively, according to step (1)
Identical mode, by the output control signal of signal processing circuit 6 to current control circuit 5, make to flow through detection group LED uviol lamps
Linear change is presented in 1 electric current；Then signal processing circuit 6 is separately recorded in N parts control air sample under different current conditions
This is then different by N parts respectively by the uitraviolet intensity signal after organizing the amplification of signal amplification circuit 4 during detection pipe 2 after testing
Uitraviolet intensity value under current conditions is averaged, and these uitraviolet intensity average values are designated as into the second uitraviolet intensity ginseng
According to value, the 3rd uitraviolet intensity reference point ... N+1 uitraviolet intensity reference points, wherein N are natural number more than or equal to 3；
Step (3), the N+1 part uitraviolet intensity reference points obtained according to step (1) and step (2), obtain a control
Content of organics from organizing the uitraviolet intensity value after signal amplification circuit 4 amplifies after testing in air sample under different current conditions
Between the table of comparisons；
Step (4), detection group LED uviol lamps 1 are kept to open, by aspiration pump by air to be measured by the detection pipe 2,
According to step (1) identical mode, by the output control signal of signal processing circuit 6 to current control circuit 5, make to flow through detection
Linear change is presented in the electric current of group LED uviol lamps 1；Then signal processing circuit 6 is recorded under different current conditions group after testing
Uitraviolet intensity signal after the amplification of signal amplification circuit 4, and these uitraviolet intensity values are averaged, then this is averaged
Value is designated as uitraviolet intensity detected value, the table of comparisons then obtained by query steps (3), obtains having in now air to be measured
Machine thing content.
Embodiment two
Unlike embodiment one, organic matter detection sensor also includes control component, and referring to shown in Fig. 5~9, this is right
Include according to component：
Control group LED uviol lamps 10, control group LED uviol lamps 10 connected with the detection group LED uviol lamps 1 after with electric current
Control circuit 5 connects and controlled by current control circuit 5 electricity for flowing through detection group LED uviol lamps and control group LED uviol lamps 10
Flow size；
The control tube 7 that can be penetrated by the ultraviolet that the control group LED uviol lamps 10 are sent, the inner vacuum of control tube 7 or
If air sets pure water；
The ultraviolet line receiver 8 of control group, for detect sent from the control group LED uviol lamps 10 and penetrate it is described right
Look after the intensity of the ultraviolet after 7；
Control group signal amplification circuit 9, output end and the control group signal amplification circuit 9 of the ultraviolet line receiver 8 of control group
Input connection, the uitraviolet intensity signal for the ultraviolet line receiver 8 of control group to be detected is amplified；
The output end of control group signal amplification circuit 9 is also connected with signal processing circuit 6, and signal processing circuit 6 is according to inspection
Ultraviolet after uitraviolet intensity signal and control group signal amplification circuit 8 after the amplification of survey group signal amplification circuit 4 amplify is strong
Degree signal of change passes through content of organics in air in detection pipe 2.
Control tube accommodating cavity is additionally provided with housing 11, control tube 7 is arranged in control tube accommodating cavity；The current control electricity
Road 5, detection group LED uviol lamps 1 and control group LED uviol lamps 10 are arranged on same circuit board, and are arranged on housing 11 1
Side, the ultraviolet line receiver 3 of detection group, detection group signal amplification circuit 4, the ultraviolet line receiver 8 of control group, control group signal are put
Big circuit 9 and signal processing circuit 6 are arranged on another piece of circuit board, and are arranged on 11 another opposite side of housing；In housing 11
Be additionally provided with it is being connected with control tube accommodating cavity, positioned at the light transmission passage 11c of control tube accommodating cavity two opposite sides the 3rd and the 4th printing opacity
The ultraviolet light that passage 11d, control group LED uviol lamp 10 is sent is led to by the 3rd light transmission passage 11c, the printing opacity of control tube 7 and the 4th
The ultraviolet line receiver 8 of control group is reached after road 11d, referring to shown in Fig. 4~8.
The detection method of organic matter detection sensor in the present embodiment comprises the following steps：
Step (1), open detection group LED uviol lamps 1 and control group LED uviol lamps 10, are exported by signal processing circuit 6
Control signal makes the electric current for flowing through control group LED uviol lamps 10 that linear change be presented to current control circuit 5；Then at signal
Reason circuit 6 is separately recorded in the uitraviolet intensity signal after the amplification of control group signal amplification circuit 9 under different current conditions, and
These uitraviolet intensity values are averaged, are then designated as the first uitraviolet intensity reference point；
Step (2), prepare the control air sample that known to N parts content of organics and content differs, keep the inspection
Survey group LED uviol lamps 1 are opened, and this N part control air sample then are passed sequentially through into the detection pipe 2 respectively, according to step (1)
Identical mode, by the output control signal of signal processing circuit 6 to current control circuit 5, make to flow through detection group LED uviol lamps
Linear change is presented in 1 electric current；Then signal processing circuit 6 is separately recorded in N parts control air sample under different current conditions
The uitraviolet intensity signal after signal amplification circuit 4 amplifies is organized when originally flowing through detection pipe 2 after testing, it is then respectively that N parts is different
Uitraviolet intensity value under current conditions is averaged, and these uitraviolet intensity average values are designated as into the second uitraviolet intensity ginseng
According to value, the 3rd uitraviolet intensity reference point ... N+1 uitraviolet intensity reference points, wherein N are natural number more than or equal to 3；
Step (3), the N part uitraviolet intensity reference points obtained according to step (2), obtain has in a control air sample
Machine thing content from organizing the control between the uitraviolet intensity value after signal amplification circuit 4 amplifies after testing under different current conditions
Table；
Step (4), keep detection group LED uviol lamps 1 and control group LED uviol lamps 10 to open, extracted by air pump to be measured
Air and by detection pipe 2, according to step (1) identical mode, electric current control is given by the output control signal of signal processing circuit 6
Linear change is presented in circuit 5 processed, the electric current for making to flow through detection group LED uviol lamps 1 and control group LED uviol lamps 10；Signal transacting
Circuit 6 is recorded in the uitraviolet intensity signal after the amplification of control group signal amplification circuit 9 under different current conditions, then by this
A little uitraviolet intensity values are averaged, and the uitraviolet intensity average value is designated as into interim uitraviolet intensity reference point, will be interim purple
Outer line strength reference point divided by the first uitraviolet intensity reference point, obtain intensity of light source attenuation ratio；Synchronous signal process circuit 6
It is recorded in and organizes the uitraviolet intensity signal after signal amplification circuit 4 amplifies under different current conditions after testing, it is then that these are purple
Outside line intensity level is averaged, and uitraviolet intensity average value is designated as into uitraviolet intensity detected value, and uitraviolet intensity is detected
Value is multiplied by intensity of light source attenuation ratio, uitraviolet intensity lookup value is obtained, then using the uitraviolet intensity lookup value, by looking into
The table of comparisons that step (3) obtains is ask, obtains the content of organics in now air to be measured.
Embodiment three
Unlike embodiment one, the air filtration dress for the solid particle being used in air filtering is provided with front of aspiration pump
Put 104, it is shown in Figure 6.
Because the solid particle (such as PM2.5) in air has a barrier effect for light, different time, in air
PM2.5 contents are different, and light blocking effect is also different, so, in embodiment one, PM2.5 is detected for organic matter detection sensor and tied
Certain interference be present in fruit.The present embodiment can be preferably minimized this interference.Due to solid particle in air volume much
More than the organic matter volume such as bacterium, formaldehyde, organic benzene, organic, so, solid particle can effectively be blocked by air filter in air
Cut down and, and the organic matter for needing to detect can pass through filter, and air filter senses for organic analyte detection
Device plays certain protective effect.
Claims (5)
- A kind of 1. organic matter detecting system in air, it is characterised in that：Including the air pump (101) for extracting air, with air pump The organic matter detection sensor (102) of output end connection, and the display screen (103) being connected with organic matter detection sensor (102), Wherein described organic matter detection sensor (102) includes that the light source of ultraviolet can be sent and can detect sky with what the light source coordinated The detection components of content of organics in gas, wherein the light source is detection group LED uviol lamps (1), detection group LED uviol lamps (1) The size of current that detection group LED uviol lamps are flowed through by current control circuit (5) control is connected with current control circuit (5)；It is described Detection components includeThe detection pipe (2) that can be penetrated by the ultraviolet that the detection group LED uviol lamps (1) send, water can pass through the detection pipe (2)；The ultraviolet line receiver of detection group (3), sent for detection from the detection group LED uviol lamps (1) and penetrate the detection Manage the intensity of the ultraviolet after (2)；Detection group signal amplification circuit (4), output end and the detection group signal amplification circuit of the ultraviolet line receiver of detection group (3) (4) input connection, the uitraviolet intensity signal for the ultraviolet line receiver of detection group (3) to be detected are amplified；Signal processing circuit (6), the output end of detection group signal amplification circuit (4) is connected with signal processing circuit (6), at signal Reason circuit (6) is also connected with current control circuit (5), and signal processing circuit (6) is amplified according to detection group signal amplification circuit (4) Uitraviolet intensity signal of change afterwards passes through content of organics in detection pipe (2) interior air；Display screen (103) is connected with signal processing circuit (6), for showing the content of organics in air.
- 2. organic matter detecting system in air according to claim 1, it is characterised in that：The organic matter detection sensor (102) also include housing (11), be provided with detection pipe accommodating cavity in the housing (11), detection pipe (2) is arranged on detection pipe and housed Intracavitary；The current control circuit (5) and detection group LED uviol lamps (1) are arranged at housing (11) side, detection group ultraviolet Receiver (3), detection group signal amplification circuit (4) and signal processing circuit (6) are arranged on housing (11) another opposite side；Housing (11) in be provided with connected with detection pipe accommodating cavity, positioned at the first light transmission passage of detection pipe accommodating cavity two opposite sides and the second printing opacity Passage, after the ultraviolet light that detection group LED uviol lamps (1) are sent is by the first light transmission passage, detection pipe (2) and the second light transmission passage Reach the ultraviolet line receiver of detection group (3).
- 3. organic matter detecting system in air according to claim 1, it is characterised in that：The organic matter detection sensor (102) control component is also included, the control component includes：Control group LED uviol lamps (10), control group LED uviol lamps (10) connected with the detection group LED uviol lamps (1) after with electricity Flow control circuit (5) connects and flows through detection group LED uviol lamps and control group LED uviol lamps by current control circuit (5) control (10) size of current；The control tube (7) that can be penetrated by the ultraviolet that the control group LED uviol lamps (10) send, control tube (7) inner vacuum Or set air or pure water is set；The ultraviolet line receiver of control group (8), for detect sent from the control group LED uviol lamps (10) and penetrate it is described right Look after the intensity of the ultraviolet after (7)；Control group signal amplification circuit (9), output end and the control group signal amplification circuit of the ultraviolet line receiver of control group (8) (9) input connection, the uitraviolet intensity signal for the ultraviolet line receiver of control group (8) to be detected are amplified；The output end of control group signal amplification circuit (9) is also connected with signal processing circuit (6), signal processing circuit (6) basis Uitraviolet intensity signal after detection group signal amplification circuit (4) amplification and the purple after control group signal amplification circuit (9) amplification Outside line strength signal, which calculates, passes through content of organics in detection pipe (2) interior air.
- 4. organic matter detecting system in air according to claim 3, it is characterised in that：The organic matter detection sensor Also include housing (11), be provided with detection pipe accommodating cavity and control tube accommodating cavity in the housing (11), detection pipe (2) is arranged on inspection In test tube accommodating cavity；Control tube (7) is arranged in control tube accommodating cavity；The current control circuit (5), detection group LED are ultraviolet Lamp (1) and control group LED uviol lamps (10) are arranged at housing (11) side, the ultraviolet line receiver of detection group (3), detection group letter Number amplifying circuit (4), the ultraviolet line receiver of control group (8), control group signal amplification circuit (9) and signal processing circuit (6) are set Put in housing (11) another opposite side；Be provided with housing (11) it is being connected with detection pipe accommodating cavity, positioned at detection pipe accommodating cavity two The light transmission passage of opposite side first and the second light transmission passage, the ultraviolet light that detection group LED uviol lamps (1) are sent are led to by the first printing opacity The ultraviolet line receiver of detection group (3) is reached after road, detection pipe (2) and the second light transmission passage；It is provided with housing (11) and control tube It is accommodating cavity connection, ultraviolet positioned at the light transmission passage of control tube accommodating cavity two opposite sides the 3rd and the 4th light transmission passage, control group LED The ultraviolet light that lamp (10) is sent is by reaching control group ultraviolet after the 3rd light transmission passage, control tube (7) and the 4th light transmission passage Receiver (8).
- 5. organic matter detecting system in the air according to claim 1 or 2 or 3 or 4, it is characterised in that：Before the air pump Side is provided with the air filter (104) for the solid particle being used in air filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720315404.9U CN207074167U (en) | 2017-03-29 | 2017-03-29 | Organic matter detecting system in a kind of air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720315404.9U CN207074167U (en) | 2017-03-29 | 2017-03-29 | Organic matter detecting system in a kind of air |
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| CN207074167U true CN207074167U (en) | 2018-03-06 |
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| CN201720315404.9U Active CN207074167U (en) | 2017-03-29 | 2017-03-29 | Organic matter detecting system in a kind of air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340258A (en) * | 2017-03-29 | 2017-11-10 | 宁波方太厨具有限公司 | Organic matter detecting system in a kind of air |
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2017
- 2017-03-29 CN CN201720315404.9U patent/CN207074167U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340258A (en) * | 2017-03-29 | 2017-11-10 | 宁波方太厨具有限公司 | Organic matter detecting system in a kind of air |
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